Think I can get my 2.0 up to 200hp?
 

I'm contemplating a 3.2 swap (see my other thread: Help me design optimal engine setup for my hotrod), but would also like to weigh the option of rebuilding my current '69 2.0 911E engine in keeping with time period correctness...

So what kind of power do you think I could get out of it? I was thinking about switching my zeniths to PMO's, putting in higher compression cylinders (maybe to the point of twin plugging (although I am clueless about the need for that in a 2.0), switching my heat exchangers for headers, new cam, blah blah blah...

How would you go about this? Suggestions? Expertise? Keep my 2.0, or switch to 3.0, 3.2? That 4 cyl POLO engine gets ~200hp (see POLO powered 4 cylinder 911 motor in a 912) why not my 6 cyl? Only need it for street use really...

Obviously I would have to beef up my 901 gearbox a bit too...

This is easy. How much money do you want to spend?

If you put a 3.2 engine in at least you will already be at the 200 hp mark.
Not sure how hard it is to get these kind of figures from a 2.0 but I would imagine it would be less streetable.
And the money saved will be well spent on the mods to fit the 3.2 which has the added benefit of being newer technology. My 2 cents.

I wouldn't twin plug this one because even a 2.2 conversion wouldn't get above 9.5:1 compression.

As for budget. ~10k.

I could sell the 2.0 as use the money for a 3.2 to upgrade, or just upgrade the 2.0 to a 2.2. Decisions...

I also have a friend looking to get rid of his 2.4, so that's an option...

Sure, about $40,000 will do it. $10k will get you a stock rebuild if everything is in pretty good shape.

2,0 heads don't flow well and detonate, biggest budget item is in the heads.
Then case modifications
Then at least 10,3 to 1 pistons. With 72cc head volume there will be a very big dome on the pistons, hence the need for twin plugs.
Induction-- PMO at minimum but you may want to consider EFI-- $3500 to $6500
Crank mods and rods necessary to spin to 7500 RPM
Big cams, like 906
That's about the size of it.

Or you could buy a used 3,2. . . :)

Haha. That 3.2 is looking better and better.

Acording to Porsche 911 SC (1979-1983)

The 80-83 3.0L SC's are at 204hp stock and if you remove all the stock smog stuff and put an early (or larger) exhaust you can get a few more!

PS: 901 is good up to about 300hp!!!

John is pretty close,....:)

We can do 200BHP with a 2.0, however its damned expensive and will require refurbishment every 100-150 hours, or so. Further, its powerband is somewhat narrow and not only require a good close-ration gearset, but its not fun below 6K RPM.

For vintage racing, these sorts of thing are SOP, however its not a great choice for any street use.

It makes perfect sense. I think it was Dr. Porsche himself who said that if he had known that the engineers could stretch the displacement all the way to 3,6 liters, he would have told them to make the engine smaller.

Same form factor, almost the same weight. Of course you must contend with oil cooling.

Here's a thread I did a long time ago when I was at the precise point you are at in the thought process.

http://forums.pelicanparts.com/911-engine-rebuilding-forum/221927-suggestions-warmed-over-2-0-901-05-a.html

A few years later I have a great motor for my perfectly stock car.

http://forums.pelicanparts.com/uploa...1345170377.jpg

Thanks for that thread. I'm pouring over it.

[QUOTE=procan;7053054]I'm contemplating a 3.2 swap QUOTE]

I was in a similar spot as you for the last few years...do I rebuild my 2.4, or do I swap in something bigger? My car was born a '72 T. When I got it in '98, I figured I'd boost power output when it was time for a rebuild. Problem was (if you can really call it a problem), that time never came. Eventually, in a search for more top-end, I replaced the T cams with E cams and swapped the MFI for Webers (cheaper than building the MFI to E spec). This was a nice little boost. But eventually, I wanted more.

So after many years of thinking and dreaming, I finally pulled the trigger on a '84 3.2 a couple weeks ago. I sold the 2.4 & MFI, and the net cost is not bad at all. Assuming you aren't tied to your small displacement motor for nostalgic (or speculative) reasons, I think it's hard to beat the potential bang for your buck of a good swap. Of course you run the risk that any engine you buy may have issues. But you can minimize this to some extent with a little legwork. Even if it does, the cost of a basic rebuild of a 2.0 is pretty much the same as 3.2. At least when you're done with the 3.2, you have a 3.2 not a 2.0 (bet you couldn't figure that out ;)).

Now, hopfully I'll still feel this way after I get it all installed...I also bought the '84 tranny with a LSD :D

Roger

That's a Euro SC output, 9.8:1 CR, big port heads, and Euro FD.
US SC is 180 HP, 78-83.

As for the 901, i've read 1st gear will explode with much over 200HP but no experience with it.. I would go with a 915 for a later motor.

I would rebuild the engine and buy a period correct MFI

you will end with a correct car

:-)

...but a slower car ;)

I own a 69E ... after 4000rpm it is heaven ;-)

You can get 200 HP from 2.0L, but only at high RPM. Power will fall off quickly, little power and even less torque where you need it. A 3.0 or 3.2 will have low end torque that is much more useful with no added weight as noted above.

A 2.0S is a really fun engine though...

I understand completely. I have been driving a 2.4 E cammed motor for years, and it is great from 4K to just past 6K...especially the sound with M&K race mufflers (there isn't much "muffling" here). But I am really looking forward to 3.2L of "grunt".

I guess I have to decide exactly what I want. I like the idea of more period correct, but I ultimately want something fast with lots of low end, although that can get me in trouble very quickly...

2.7 rs engine could be a choice